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authorAlan Jenkins <alan-jenkins@tuffmail.co.uk>2009-06-16 14:54:04 +0100
committerJohn W. Linville <linville@tuxdriver.com>2009-06-19 11:50:18 -0400
commit464902e812025792c9e33e19e1555c343672d5cf (patch)
treecc243de464a7935291c52ac93d6bd0a24c6c08c5 /include/linux/rfkill.h
parent96e9cfeb9692b0bc6e03f9b6f9cb3c67a40b76d1 (diff)
downloadlwn-464902e812025792c9e33e19e1555c343672d5cf.tar.gz
lwn-464902e812025792c9e33e19e1555c343672d5cf.zip
rfkill: export persistent attribute in sysfs
This information allows userspace to implement a hybrid policy where it can store the rfkill soft-blocked state in platform non-volatile storage if available, and if not then file-based storage can be used. Some users prefer platform non-volatile storage because of the behaviour when dual-booting multiple versions of Linux, or if the rfkill setting is changed in the BIOS setting screens, or if the BIOS responds to wireless-toggle hotkeys itself before the relevant platform driver has been loaded. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Acked-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include/linux/rfkill.h')
-rw-r--r--include/linux/rfkill.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/rfkill.h b/include/linux/rfkill.h
index dcac724340d8..e73e2429a1b1 100644
--- a/include/linux/rfkill.h
+++ b/include/linux/rfkill.h
@@ -259,8 +259,9 @@ bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
* userspace) of their initial state. It should only be used before
* registration.
*
- * In addition, it marks the device as "persistent". Persistent devices
- * are expected to preserve preserve their own state when suspended.
+ * In addition, it marks the device as "persistent", an attribute which
+ * can be read by userspace. Persistent devices are expected to preserve
+ * their own state when suspended.
*/
void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked);